Partially Reflective Surface High Gain Antennas
Date Issued
2010
Date
2010
Author(s)
Chuang, Wei-Yen
Abstract
This thesis presents the design of Partially Reflective Surface(PRS) high gain Antennas, particularly with emphasis on the thickness reduction of the entire antenna. The advantage of the presented are the entire antenna module can be fabricated with low-cost Printed Circuit Board(PCB) and the element design can be extended to the array systems through a feeding networks for enhance of gain and aperture efficiency. Two types of feeding schemes are investigated, including patch-fed and slot-fed. For the aperture efficiency enhancement, the PRS antenna area is extended and fed by 2x2 slot-coupled microstrip lines, where the efficiency of 50% is achieved with peak gain of 12.8dBi at 4.8GHz. For the gain enhancement, the antenna is configured as arrays of metal strips that the peak gain of 13.4dBi is obtained. Additionally, the thickness of the entire antenna is reduced to thirtieth wavelength, compared to the traditional half-wavelength distance. At last, we investigate the radiating mechanism of the presented antenna, including the traveling-wave mode and the standing-wave mode due to the reflection from the edge of finite-size PRS .Through various treatments on the edge boundary, the gain may be increased from 9.7dBi to 10.9dBi and the bandwidth also improved from 18% to 23%.
Subjects
partially reflective surface
high gain antenna
aperture efficiency
leaky wave antenna
Type
thesis
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